Dedifferentiated liposarcoma (DDL) is defined as nonlipogenic sarcoma, with an abrupt transition from coexisting well-differentiated liposarcoma (WDL). However, intermingled transition in a mosaic pattern between WDL and DDL is not infrequently encountered. Here, the authors review clinicopathological features of 30 cases of DDL associated with lipoma-like WDL. Histological examination revea…